If your linux box already recently seen traffic from that device (say, mac is 00:07:E9:62:8F:F3), it will have its mac/ip in the arp cache.

Here's how to get another IP address to your Linux server and why you should do that. Your Linux server naturally comes with its own public IP address, but there's a way to add another one to your ...

The script described here can change Linux systems' IP addresses from dynamic to static with much less manual work.